Blue Sky Detection for Picture Quality Enhancement
نویسندگان
چکیده
Content analysis of video and still images is attractive for multiple reasons, such as enabling content-based actions and image manipulation. This paper presents a new algorithm and feature model for blue-sky detection. The algorithm classifies the sky areas by computing a pixel-accurate sky probability. Such a probabilistic measure matches well with the requirements of typical video enhancement functions in TVs. This algorithm enables not only content-adaptive picture quality improvement, but also more advanced applications such as content-based annotation of, and retrieval from image and video databases. When compared to existing algorithms, our proposal shows considerable improvements in correct detection/rejection rate of sky areas, and an improved consistency of the segmentation results.
منابع مشابه
Sky Detection in CSC-segmented Color Images
We present a novel algorithm for detection of sky areas in outdoor color images. In contrast to sky detectors in literature that detect only blue, cloudless sky we intend to detect all sorts of sky, i.e. blue, clouded and partially clouded sky. Our approach is based on the analysis of color, position, and shape properties of color homogeneous spatially connected regions detected by the CSC. An ...
متن کاملA Comparative Study of the Visual Elements in Five Miniatures of the Prophet’s Ascension
The epistles of the nocturnal ascent are some versified or prosaic narrations deal with the Ascension orspiritual journey of the Prophet and his observations and levels in this Divine way. According to their cultural traditions and religious beliefs, the Iranian Muslim painters as well as the Persian poets and writers have illustrated this story and prepared several painted manuscripts. Some of...
متن کاملStatic Filtered Sky Color Constancy
In Computer Vision, the sky color is used for lighting correction, image color enhancement, horizon alignment, image indexing, and outdoor image classification and in many other applications. In this article, for robust color based sky segmentation and detection, usage of lighting correction for sky color detection is investigated. As such, the impact of color constancy on sky color detection a...
متن کاملSky detection and log illumination refinement for PDE-based hazy image contrast enhancement
This report presents the results of a sky detection technique used to improve the performance of a previously developed partial differential equation (PDE)-based hazy image enhancement algorithm. Additionally, a proposed alternative method utilizes a function for log illumination refinement to improve de-hazing results while avoiding over-enhancement of sky or homogeneous regions. The algorithm...
متن کاملThe Effect of Different Task Types on Learning Prepositions in Form–Focused and Meaning–Focused Interaction Enhancement-Based Classes
The current study examines the impact of different task types on learning prepositions in form and meaning- focused interaction enhancement- based classes. The participants were 57 second Year University students enrolled in three intact lab classes at Tabriz Islamic Azad University. The first group was provided with form-focused interaction enhancement, the second with the meaning-focused int...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006